Question

计算下面各题能用简便方法计算的，要用简便方法计算。（2/3+5/11）x33

Answer 1

解：(1)24分之11×16
=(11/24)×16
=(11/3)×2
=22/3
=7+1/3(即7又3分之1)
(2)4分之1×7分之2
=(1/4)×(2/7)
=(1/2)×(1/7)
=1/14
(3)12分之7×6+12分之5×6
=(7/12)×6+(5/12)×6
=(7/12+5/12)×6
=1×6
=6
(4)5分之3×6分之5
=(3/5)×(5/6)
=(3/1)×(1/6)
=1/2
(5)13分之5×7分之4×14
=(5/13)×(4/7)×14
=(5/13)×(4/1)×2
=(5/13)×8
=40/13
=3+1/13
(6)9分之4×5×18
=(4/9)×5×18
=[(4/9)×18]×5
=2×5
=10